Original Schmidt Test Hammer Type L

Product Code

FIR-0563 Original Schmidt Test Hammer Type L (Proceq)
FIR-0565 Rock Cradle
FI-3040 Calibration Anvil


ASTM D 5873; ISRM Suggested Method

In rock mechanics, The Type L Original Schmidt (FIR-0563 is commonly used for the classification of rock cores and brittle rock.

FIR-0563 Type L Hammer is a portable and relatively inexpensive instrument for measuring the surface hardness of rock. The hammer can be used efficiently in both laboratory and the field setting.

The mechanism of operation is simple: a hammer released by a spring, indirectly impacts against the rock surface through a plunger and the rebound  is read on scale of hammer then  compressive strength is read directly from the curve ranging from 10 to 70 MPa (1,450 to 10,152 psi).

The type L hammer is used on NX or larger core specimens or block specimens having an edge length of at least 6 cm.

FIC-3040 Calibration Anvil, manufactured from a special steel alloy, is used for the calibration of test hammers.

Technical Specifications

Measuring Range

10-70 N/mm2

Impact Energy

0.735 Nm



Weigth (approx.)


340x120x120 mm

2 kg


150x110x310 mm

6 kg  


150x150x230 mm

16 kg

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